Door Chime, Satisure Wireless Door Open Contact Sensor Alarm Chime with 600 FT Range 58 Chimes 5 Volume Levels LED Indicators, Door Ringer Alert for Business/Store/Home/Office When Entering

?【Easy Installation】The door chime and door sensor are already paired. The first step is to stick the sensor on the door/window (the distance between the two parts should not exceed 0.4 inches), and the second step is to plug the chime receiver into the socket. Installation is completed!
?【Upgraded Battery】Using household alkaline batteries, designed with ultra-low power design, our door sensor chime allows the battery to last up to 7200 times.
?【600ft Wireless Range and Expandable Pairing】All the Satisure brand’s door entry chime and sensor alarm can be paired with each other, and one receiver/sensor can pair up to 58 sensors/receivers. With a wireless range of 600ft, it meets the needs of long-distance and multiple pairings for home, businesses, and stores.